What Spanish term best expresses the concept of a class powerpoint presentation?
This would be the usual thing (for a class in Spanish): pictures, a few descriptive words, etc.
I'm really not sure, but I'm still going to throw out my suggestion:
Power Point is a program that creates slideshows, a slideshow is not a PowerPoint. For instance, Keynote also creates slideshows. Obviously enough, it would be totally incorrect to call it a PowerPoint presentation. I hope you know that when referring to businesses, brands, etc. you don't change the name too much.
That probably made no sense, so let me restate in a different form. If it is, indeed a PowerPoint presentation, you could either say "PowerPoint," or merge two spanish words together like "PotenciaPunto" or something. :D However, it would be more proper to call it a slide show - "la exposición de diapositiva."
That probably made no sense whatsoever, but, in case it did, I hope it helped.